public ActionResult Edit_CourseGrade(CourseGrade ob)
        {
            if (ModelState.IsValid)
            {
                CourseGradeBL.Update(ob);

                return(RedirectToAction("course_Grade"));
            }
            else
            {
                return(View());
            }
        }
        //EDIT
        //Edit in Gpa Grade Table

        public ActionResult course_Grade()
        {
            return(View(CourseGradeBL.GetAll()));
        }
        public ViewResult Edit_CourseGrade(int id)
        {
            var ob = CourseGradeBL.GetById(id);

            return(View(ob));
        }